The A/C in my car gets hot/cold, but it doesn't blow... What is that? on 2004 Chevrolet Impala

Sometimes when I hit a bump or a door is slammed, the blower kicks in and blows really hard, but most of the time it doesn't blow.

Asked by for the 2004 Chevrolet Impala
3 answers 1 comment
Sounds like a blower motor, brushes going bad.
Id say u gotta blowing problem , check the connector on the blower, turn it
On and wiggle it , i think its a loose connection....
bad blower motor resistor and pigtail. there is an updated pigtail avail at dealer
About how much would getting those replaced cost?